Lathe grinder attachment.



T. E. WOOD & W. H. SAFFORD,Jn.

LATHE GRINDER ATTACHMENT.

APPLICATION FILED IULY 21. m4.

1 1 37,37 1 Patented Apr. 27, 1915.

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L GRINDER ATTACHM APP non FILED JULY 21.

1,137,371. Patented 27, 1915.

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THOMAS E. WOOD AND WILLIAM H. SAFFORD, JR, OF GREAT FALLS, MONTANA.

Specification of Letters Patent.

Patented Apr. 27, 1915.

Application filed July 27, 1914. Serial No. 853,459.

To all whom it may concern:

Be it known that we, THOMAS E. VVoon and WILLIAM H. SAFFORD, Jr.,citizens of the United States, residing at Great Falls. in the county ofCascade and State of Montana, have invented certain new and usefulImprovements in Lathe Grinder Attachments, of which the following is aspecification.

Our invention relates to a grinding attachment to be applied to or used1n connection with lathes or milling machines.

An important object of the invention 15 to provide means of the abovementioned character, so constructed that the grinder may be driven by arotatable shaft extending through the spindle of the lathe.

A further object of the invention is to provide an attachment of theabove mentioned character, so constructed that the same will operate ina thorough and expeditious manner, and may be quickly and easilyadjusted to operate upon work of different sizes. I

A further object of the invention is to provide means of the abovementioned character, which are simple in construction, inexpensive tomanufacture, strong, durable, and not liable to derangements.

Other objects and advantages of the in vention will be apparent duringthe course of the following description.

In the accompanying drawings forming a part of this specification *andin which like numerals are employed to designate like parts throughoutthe same, Figure 1 is a side elevation of a lathe having an attachmentembodying my inventlon applied thereto, Fig. 2 is an enlarged centrallongitudinal sectional view through the rotatable grinder carrier orcylinder, Fig. 3 is a transverse sectional view taken on line 3-3 ofFig. 2, and Fig. 4 is a central longitudinal sectional view through thelathe spindle and associated elements.

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of our invention, the numeral 5 designates a tableor body portion of the lathe, upon which are mounted the operatingelements of the same. Adapted to move longitudinally of the table 5 is acarriage 6, having an angle plate 7, secured thereto. Rigidly connectedwith this angle plate 7 by any suitable means is a cylinder or cylinders8, to be ground, as shown. The carriage 6 may be moved longitudinally ofthe table by the automatic feed means or manually, as the well knownconstruction in the ordinary lathe. Arranged adjacent the opposite endof the table 5 are stationary bearings 9 and 10, through which isjournaled a horizontal tubular spindle 11, of the ordinary latheconstruction. This lathe spindle constitutes the operating element ofthe lathe, and while it is free to rotate, the same cannot partake ofperceptible longitudinal or lateral movements. The lathe tubular spindle11 is driven or rotated by a step-pulley 12 receiving its rotation froma belt 13, as shown. The inner end of the lathe tubular spindle 11extends inwardly beyond the bearing 10, and is externally screwthreaded,as shown at 14, for engagement with suitable apparatus, or the cylinderor grinder carrier of my attachment, to be next described.

My attachment or apparatus comprises a preferably horizontally arrangedgrinder carrier or cylinder 15, which as more clearly shown in Fig. 2,has its attaching end 16 preferably formed solid and provided with aninternally screw-threaded axial bore or opening 17, havingscrew-threaded engagev ment with the inner screw-threaded end of thelathe tubular spindle. This tubular cylinder or grinder carrier isstraight and concentrically connected with the tubular spindlefin end toend relation. While this is the preferred manner of connecting thegrinder carrier or cylinder with the lathe tubular spindle, I wish itunderstood that the invention 15 in no sense solely restricted to suchconnection as the same may be be eliected by other suitable means. It isobvious that the grinder carrier or cylinder 15 is rotated upon itslongitudinal axis with the lathe tubular spindle.

The solid portion 16 of the grinder carrier or cylinder 15 is providedcentrally thereof with an axially'extending opening or bore 15}, toreceive a shaft 19 rotatable with relation to the grinder carrier orcylinder carrler or cylinder 15. 'The shaft 19 has its outer endextending into the lathe tubular spindle and is provided with an axiallyextending opening or bore 20, formed square in cross-section or otherthan round, to receive the end 21, formed square in crossgrinding wheel34 will enter the bore of the 'cylinder, to grind the same. During.,this

section or other than round, of a drive shaft 22, which extends throughthe lathe tubular spindle 11, and is preferably 1ournaled through abearing 23. The driving shaft 22 receives its rotation from a groovedpulley 24 rigidly attached to the outer end thereof, the same beingdriven by a belt 25 or the like. Particular attention is called to thefact that the driving shaft 22, which operates the grinder cylinder tobe referred to, extends through the lathe tubular spindle, these twoelements being rotatable with relation to each other.

As more clearly shown in Figs. 2 and .3, the inner end of the grindercarrier or cylinder 15 is preferably provided with a head or solidportion 26, having a cylindrical axial opening or bore 27, eccentricallyarranged with relation thereto. Mounted to turn or rotate within thebore 27 is a concentric feed bearing 28, provided upon one side,preferably the inner side, with screw or worm teeth 29, to engage withthe teeth of a feed worm 30, extending through an opening 31 in the heador solid portion 26. The feed worm 30 may be held against longitudinalmovement by any suitable means,

an illustration of the same being a screw or bolt 32, operating withinan annular groove 33 formed in the end worm 30. The opposite end of thefeed worm 30 is preferably provided with an opening or recess 34, toreceive the end of a key or other suitable tool, for turning the same.In Fig. 2, the

eccentric feed bearing 28 is shown as being held against perceptiblelongitudinal movement with respect to the head or solid portion 26 by ascrew or bolt 35, the inner end of which extends into a curved groove,36,

formed upon the eccentric feed bearing. The eccentric feed bearing 28 isprovided with an axial opening or bore 37, arranged eccentric withrelation thereto, for receiving an eccentric grinder shaft or arbor 38.The inner end of the grinder shaft 38 is connected with'a coupler-shaft39 by a universal joint 40, the opposite end of the couplershaft 39being connected with the shaft 19 by a universal joint 41. Rigidlysecured to the outer end of the grinder shaft or arbor 38 is a grinderor grinder wheel 42 of any well known or preferred type.

The operation of the apparatus is as follows :The work, in this instancethe cylinder or cylinders 8, is placed in position upon the carriage ofthe lathe to be. moved therewith, such movement beingeffectedautomatically or manually. The carriage is advanced sufiicientlywhereby the grinder or grinding operation, the grinder 42 pal-takes of aplanetary movement, that is it is bodily rotated with the grindercarrier or cylinder 15, and also rotates upon its axis with relationthereto. The grinder may be fed or advanced by proper manipulation ofthe feed worm 30, which turns the concentric feed bearing 28. Thegrinder 42 is driven from or by the driving shaft 22, extending axiallythrough the lathe tubular spindle, which effects the rotation of thegrinder carrier or cylinder.

It is to be understood that the form of our invention herewith shown anddescribed is to be taken as a preferred example of the same, and'thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subjoined claims.

Having thus described our invention, we claim 1. The combination withthe tubular spindle of a lathe or like machine, of a substantiallystraight tubular grinder carrier concentrically connected with one endof the tubular spindle in end to end relation thereto, a rotatable feedbearing arranged within the tubular grinder carrier and being eccentricwith relation thereto, a grinder shaft extending longitudinally withinthe tubular grinder carrier and journaled through the feed bearing, agrinder carried by the outer end of the grinder shaft, a driving shaftextending through the tubular spindle and having connection with thegrinder shaft, and means to turn the feed bearing.

2. An attachment to be connected with the rotatable tubular spindle of alathe, comprising a tubular body portion to be concentrically connectedwith the tubular spindle, a rotatable feed bearing eccentrically mountedwithin the tubular body portion, means to turn the feed bearing withrelation to the body portion, a grinder carrying shaft extending withinthe tubular body portion and through the feed hearing, and a drivingshaft extending through the tubular body portion and having operativeconnection with the grinder carrying shaft.

3. The combination with the tubular spindle of a lathe or like machine,of a tubular grinder carrier connected therewith to be rotated thereby,an eccentric feed hearing extending longitudinally within the tubulargrinder carrier and having an cebearin a grinder secured to the outerpor- In testimony whereof we aifix our signation ()1 the grinds! sgaft,ahdriil xing 1ghzlift tures in presence of two witnesses.

exten ing ongitu ina y wit in t e tu u ar spindle, a couplin shafthaving universal J connections with t e driving shaft and the indershaft, means to rotate the driving Witnesses:

shaft, and means to rotate the tubular spin- JULIUS Pn'mns,

dle. LA Rm: SMITH.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

